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-rw-r--r--Documentation/drivers/edac/edac.txt16
1 files changed, 15 insertions, 1 deletions
diff --git a/Documentation/drivers/edac/edac.txt b/Documentation/drivers/edac/edac.txt
index 7b3d969d296..3c5a9e4297b 100644
--- a/Documentation/drivers/edac/edac.txt
+++ b/Documentation/drivers/edac/edac.txt
@@ -339,7 +339,21 @@ Device Symlink:
'device'
- Symlink to the memory controller device
+ Symlink to the memory controller device.
+
+Sdram memory scrubbing rate:
+
+ 'sdram_scrub_rate'
+
+ Read/Write attribute file that controls memory scrubbing. The scrubbing
+ rate is set by writing a minimum bandwith in bytes/sec to the attribute
+ file. The rate will be translated to an internal value that gives at
+ least the specified rate.
+
+ Reading the file will return the actual scrubbing rate employed.
+
+ If configuration fails or memory scrubbing is not implemented, the value
+ of the attribute file will be -1.